Table 1 Description of the study population (n = 236,963)
| Â | n | % |
|---|---|---|
Gender | ||
 Male | 115,581 | 48.8 |
 Female | 121,382 | 51.2 |
Year of secondary school | ||
 1st year lower sec. | 44,740 | 18.9 |
 2nd year lower sec. | 44,239 | 18.7 |
 3rd year lower sec. | 44,208 | 18.8 |
 1st year upper sec. | 44,198 | 18.7 |
 2nd year upper sec. | 35,887 | 15.1 |
 3rd year upper sec. | 23,701 | 10.0 |
Family finances past 2 years | ||
 Well off all the time | 108,135 | 45.6 |
 Mostly well off | 76,442 | 32.3 |
 Neither well off nor badly off | 39,961 | 16.9 |
 Mostly badly off | 9772 | 4.1 |
 Badly off all the time | 2653 | 1.1 |
Cannabis use past 12 months | ||
 Not at all | 217,463 | 91.8 |
 Once | 6867 | 2.9 |
 2–5 times | 6272 | 2.6 |
 6–10 times | 1937 | 0.8 |
 11 or more times | 4424 | 1.9 |
Headache past month | ||
 Not at all | 48,907 | 20.6 |
 Sometimes | 115,114 | 48.6 |
 Many times | 56,404 | 23.8 |
 Every day | 16,538 | 7.0 |
Neck and shoulder pain past month | ||
 Not at all | 85,921 | 36.3 |
 Sometimes | 92,965 | 39.2 |
 Many times | 40,641 | 17.2 |
 Every day | 17,436 | 7.4 |
Joint and muscle pain past month | ||
 Not at all | 115,635 | 48.8 |
 Sometimes | 81,844 | 34.5 |
 Many times | 28,760 | 12.1 |
 Every day | 10,724 | 4.5 |
Abdominal pain past month | ||
 Not at all | 84,815 | 35.8 |
 Sometimes | 101,094 | 42.7 |
 Many times | 41,950 | 17.7 |
 Every day | 9104 | 3.8 |
Nausea past month | ||
 Not at all | 92,282 | 38.9 |
 Sometimes | 106,119 | 44.8 |
 Many times | 31,638 | 13.4 |
 Every day | 6924 | 2.9 |
Palpitations past month | ||
 Not at all | 154,543 | 65.2 |
 Sometimes | 55,062 | 23.2 |
 Many times | 20,256 | 8.5 |
 Every day | 7102 | 3.0 |
Felt that everything is a struggle past week | ||
 Not been affected | 63,658 | 26.9 |
 Been affected a little | 82,034 | 34.6 |
 Been affected quite a lot | 55,099 | 23.3 |
 Been affected a lot | 36,172 | 15.3 |
Had sleep problems past week | ||
 Not been affected | 80,968 | 34.2 |
 Been affected a little | 84,843 | 35.8 |
 Been affected quite a lot | 44,259 | 18.7 |
 Been affected a lot | 26,893 | 11.3 |
Felt unhappy, sad or depressed past week | ||
 Not been affected | 95,376 | 40.2 |
 Been affected a little | 76,162 | 32.1 |
 Been affected quite a lot | 39,976 | 16.9 |
 Been affected a lot | 25,449 | 10.7 |
Felt hopeless about the future past week | ||
 Not been affected | 107,940 | 45.6 |
 Been affected a little | 64,914 | 27.4 |
 Been affected quite a lot | 37,956 | 16.0 |
 Been affected a lot | 26,153 | 11.0 |
Felt stiff or tense past week | ||
 Not been affected | 98,613 | 41.6 |
 Been affected a little | 75,335 | 31.8 |
 Been affected quite a lot | 41,621 | 17.6 |
 Been affected a lot | 21,394 | 9.0 |
Worried too much about things past week | ||
 Not been affected | 62,294 | 26.3 |
 Been affected a little | 67,702 | 28.6 |
 Been affected quite a lot | 60,729 | 25.6 |
 Been affected a lot | 46,238 | 19.5 |